[Webkit-unassigned] [Bug 192290] New: PSON-launched web processes never get windowScreenDidChange, so have no displayID

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=192290

            Bug ID: 192290
           Summary: PSON-launched web processes never get
                    windowScreenDidChange, so have no displayID
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: simon.fraser at apple.com

If you add logging in DisplayRefreshMonitorManager::scheduleAnimation() in the if (!client.hasDisplayID()) early return, you'll find that we early return there in PSON-launched processes when the page calls requestAnimationFrame.

To repro: launch MiniBrowser, go to webkit.org, then navigate to browserbench.org (PSON navigation), and run MotionMark. You'll see lots of that logging.

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